CN103474726B - Elliptic Function Type low pass filter - Google Patents
Elliptic Function Type low pass filter Download PDFInfo
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- CN103474726B CN103474726B CN201310373690.0A CN201310373690A CN103474726B CN 103474726 B CN103474726 B CN 103474726B CN 201310373690 A CN201310373690 A CN 201310373690A CN 103474726 B CN103474726 B CN 103474726B
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- gating
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Abstract
The present invention discloses a kind of Elliptic Function Type low pass filter, the coupling path including low pass filtering access and be connected with low pass filtering access input, this coupling path is arranged in a containing cavity, coupling path comprises the distributed capacitor that is made up of the one the second coupling bars and by single-pass switch and the first gating branch road of respectively drawing from single-pass switch ends and the second gating branch road and the gating circuit formed, the free end of the first gating branch road is electrically connected the first coupling bar, and the free end of the second gating branch road is electrically connected the second coupling bar.There is the gating circuit of infra-low frequency signal gating function.The present invention has the following advantages: first, realizes that low pass filter blocks direct current, the gating function of infra-low frequency signal first; Secondly, the gating function of low pass filter is realized by modular coupling path, thus this coupling path can be generalized to other such as devices such as mixer or this duplexer.
Description
Technical field
The present invention relates to one and belong to communication radio frequency cavity devices, refer in particular to have and certain suppress to require and direct current blocks, the low pass filter of infra-low frequency signal gating function.
Background technology
Along with the development of the integration of three networks and enabling of LTE frequency range, relatively traditional frequency range, new frequency range is just towards lower and higher both direction development.Along with the introducing of new standard or system, the requirement of market to passive device is more and more higher.
Filter is widely used in the communications field as a kind of frequency selection device, especially field of radio frequency communication.And join communication system passage along with television system, video on-demand system, need a kind of high performance low pass filter, on the basis realizing cable TV signal normal transmission, need there is higher degree of suppression to mobile communication system simultaneously.
The function of published low pass filter is to allow the signal component below a certain frequency pass through, and suppresses greatly signal component more than frequency, and functionally visible low pass filter is all acquiescence by direct current signal and frequency approach in the signal of zero.If system is on circuit residing for low pass filter, have the requirement of gating than the signal of this low pass filter cutoff frequency also low certain frequency, and to the requirement that direct current signal blocks, then low pass filter technology there is no method and meets this requirement at present.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, radiofrequency signal and TV signal are passed through to provide one to ensure, block, Elliptic Function Type low pass filter that infra-low frequency signal has gating function to direct current simultaneously.
Another object of the present invention is to provide a kind of mixer, direct current blocks to have described in making, the Elliptic Function Type low pass filter of infra-low frequency gating function further expands its application.
Another object of the present invention is to provide a kind of duplexer, to have described in making, direct current blocks, the path of the Elliptic Function Type low pass filter of infra-low frequency gating function further expand its application.
For reaching the object of foregoing invention, the present invention is achieved through the following technical solutions:
A kind of Elliptic Function Type low pass filter, the coupling path including low pass filtering access and be connected with low pass filtering access input, this coupling path is arranged in a containing cavity, wherein, described coupling path includes: distributed capacitor, include the second coupling bar that above-mentioned hole can be inserted in the first coupling bar of one end band hole and one end, described second coupling bar and the first coupling bar plug together formation distributed capacitor at hole place; Gating circuit, include single-pass switch and the first gating branch road of respectively drawing from single-pass switch ends and the second gating branch road, the free end of the first gating branch road is electrically connected the first coupling bar, and the free end of the second gating branch road is electrically connected the second coupling bar.
Concrete, the first gating branch road of described gating circuit and the second gating branch road be all by an electric capacity and an inductance in series, the capacitor and inductor of wherein connecting, connects single-pass switch one end at electric capacity free end, connects corresponding coupling bar at inductance free end.
Described coupling path also comprises isolated medium, first coupling bar is one end band hole stub, the other end of the first coupling bar is electrically connected as the input of free end and low pass filtering access, second coupling bar is the stub that one end can penetrate the first coupling bar hole, the other end of the second coupling bar as free end for accessing external input signal, and the second coupling bar is inserted in the first coupling bar hole, and the first coupling bar and the second coupling bar leave space in hole, penetrate hole part at the second coupling bar and be also arranged with isolated medium, second coupling bar and the first coupling bar are isolated.
Described dielectric is thin film dielectrics.
Further, the first coupling bar of described coupling path and the cross section of the second coupling bar are triangle or circular or other polygons.
Further, the both sides of first coupling bar one end of described coupling path are taked to extend two and are paralleled or uneven conductor piece, and second coupling bar one end is inserted between two conductor pieces, and insert part cover and have medium.
Mixer of the present invention, it comprises and aforesaidly has that direct current blocks, the overall structure of the Elliptic Function Type low pass filter of infra-low frequency gating function.
Duplexer of the present invention, it comprises and aforesaidly has that direct current blocks, the overall structure of the Elliptic Function Type low pass filter of infra-low frequency gating function.
Compared with prior art, Elliptic Function Type low pass filter of the present invention, by adopting distributed capacitor and the input control means to signal, enables Elliptic Function Type low pass filter realize blocking direct current, the gating function of infra-low frequency signal.The realization of this function, tool has the following advantages:
First, realize that low pass filter blocks direct current signal, the function of infra-low frequency signal gating first;
Secondly, the gating function of low pass filter is realized by modular coupling path, thus this coupling path can be generalized to other such as devices such as mixer or duplexer.
Accompanying drawing explanation
Fig. 1 is the package assembly principle schematic of Elliptic Function Type low pass filter of the present invention.
Fig. 2 is the cutaway view of the coupling path of Elliptic Function Type low pass filter of the present invention.
Fig. 3 is the equivalent circuit theory figure of the coupling path of Elliptic Function Type low pass filter of the present invention.
Fig. 4 is the Elliptic Function Type low pass filter that the present invention is suitable for adopting described coupling path.
The equivalent circuit theory figure that Fig. 5 is low pass filtering access shown in Fig. 4.
Embodiment
Embodiment 1
Below in conjunction with drawings and Examples, the present invention is further illustrated:
Refer to Fig. 1, the embodiment of Elliptic Function Type low pass filter of the present invention, this Elliptic Function Type low pass filter has that direct current blocks, infra-low frequency gating function, it is on the basis of the Elliptic Function Type low pass filter existing for the prior art shown in Fig. 4, near its any one port, a coupling path 2 is accessed in the intrinsic DC channel of this low pass filter 1.
Wherein, described coupling path 2 includes distributed capacitor (not drawing this structure at Fig. 1), and distributed capacitor can be inserted the second coupling bar of above-mentioned hole by the first coupling bar of one end band hole and one end and be formed;
Coupling path 2 also comprises gating circuit (not drawing this structure at Fig. 1), gating circuit includes single-pass switch and the first gating branch road of respectively drawing from two electrode tips of single-pass switch and the second gating branch road, the free end of the first gating branch road is electrically connected the second coupling bar, and the free end of the second gating branch road is electrically connected the first coupling bar.
Concrete, the first gating branch road of described gating circuit and the second gating branch road be all by an electric capacity and an inductance in series, the capacitor and inductor of wherein connecting, connects single-pass switch one end at electric capacity free end, connects corresponding coupling bar at inductance free end.
Please refer to Fig. 2 and Fig. 3, disclosed Elliptic Function Type low pass filter, the coupling path 2 including low pass filtering access 1 and be connected with low pass filtering access input, this coupling path 2 is arranged in a containing cavity, and described coupling path 2 includes distributed capacitor 40 and the gating circuit 50 being connected distributed capacitor 40 two ends.
Distributed capacitor 40 includes the first coupling bar 41, second coupling bar 42 and isolated medium 43, first coupling bar 41 is the stub of one end band hole, the other end of the first coupling bar 41 is electrically connected as the inner wire of the port of coupling path 2 and the input of low pass filtering access 1, in order to form distributed capacitor 40, and one end of the second coupling bar 42 is inserted the first coupling bar 41 hole 411, second coupling bar 42 other end is as the radio-frequency (RF) signal input end of coupling path 2, and the second coupling bar 42 still leaves isolated space after inserting the first coupling bar 41 hole 411 bottom in hole 411, between this hole place first coupling bar 41 and second coupling bar 42, add isolated medium can produce distributed capacitor, so insert the sheathed isolated medium 43 of hole 411 part at the second coupling bar 42, first coupling bar 41 and the second coupling bar 42 are isolated by isolated medium 43,
Described first coupling bar 41 and the second coupling bar 42 are arranged in an accommodating cavity, first coupling bar 41 and the second coupling bar 42 all can adopt cross section to be triangle or circular or other polygonal stubs, in one end of the first coupling bar 41, hole 411 is set, the diameter of section of this hole 411 is larger than the diameter of section of the second coupling bar 42, the isolated medium 43 preferred film medium that the second coupling bar 42 rod at one end overlaps with it.
The equivalent electric circuit of the coupling path 2 according to Fig. 3, known first coupling bar 41 and the second coupling bar 42 produce distributed capacitor 40 at the place of socket-connecting, this distributed capacitor 40 can play the effect of partition to direct current signal, the capacitance of this distributed capacitor 40 is that the thickness of the size and thin film dielectrics of being inserted in hole 411 by the second coupling bar 42 decides, and the AC signal of certain frequency can be made by coupling path 2 by the capacitance adjusting distributed capacitor 40.
Further, this distributed capacitor 40 can also take upper and lower conducting strip to replace the form of coupling bar hole, namely the first coupling bar 41 and the second coupling bar 42 adopt cross section to be square stub, and the parallel both sides of one end of the first coupling bar 41 are extended two and are paralleled or conductor piece that irrelevancy is capable, one end of second coupling bar 42 is inserted between two conductor pieces, and still leave space between the second coupling bar 42 and the first coupling bar 41, adopt thin film dielectrics 43 to be completely cut off with conductor piece and the first coupling bar 41 by second coupling bar 42 again to open, thus by the first coupling bar 41, second coupling bar 42 and thin film dielectrics form distributed capacitor 40.
Described gating circuit 50, the the first gating branch road (not shown) including single-pass switch and respectively draw from single-pass switch ends and the second gating branch road (not shown), the free end of the first gating branch road is electrically connected the second coupling bar, and the free end of the second gating branch road is electrically connected the first coupling bar.Refer to Fig. 2 and Fig. 3 disclosed, in the present embodiment, concrete, described DC switch 51 is as single-pass switch, and this DC switch 51 comprises the first terminals 511 and the second terminals 512; Electric capacity 56, inductance 54 circuit in series is as the first gating branch road, and equally, electric capacity 57, inductance 55 circuit in series is as the second gating branch road.
First gating branch road of described gating circuit 50 and the second gating branch road be all by an electric capacity and an inductance in series, the capacitor and inductor of wherein connecting, connect single-pass switch one end at electric capacity free end, connect corresponding coupling bar at inductance free end, concrete structure describes as follows.
These two groups of capacitor and inductors are used for the effect by the infra-low frequency composition of input radio frequency signal and adjustment standing wave, first group of these two groups of inductance capacitances is with first of inductance 54 the lead-in wire electric connection second coupling bar 42, second lead-in wire of inductance 54 connects the first lead-in wire of electric capacity 56, and the second lead-in wire of electric capacity 56 connects the first terminals 511 of DC switch 51; Second group of capacitor and inductor is then with first of inductance 55 the lead-in wire electric connection first coupling bar 41, and the second lead-in wire of inductance 55 connects the first lead-in wire of electric capacity 57, and the second lead-in wire of electric capacity 57 connects the second terminals 512 of DC switch 51.
First terminals 511 are set to be connected with the second terminals 512 by described DC switch 51, thus coupling path 2 is connected with two parts circuit of low pass filtering access 1, then the infra-low frequency composition of input signal is directly walked around the distributed capacitor 40 of first, second coupling bar 41,42 formation of coupling path 2 and enters low pass filtering access 1; If need infra-low frequency to block, then the first terminals 511 and the second terminals 512 are set to disconnect by DC switch 51, then low pass filtering access 1 is not connected with the two-part electric capacity of coupling path 2, then input signal first through first, second coupling bar 41,42 of coupling path 2 form distributed capacitor 40 and cut off to fall the infra-low frequency composition of input signal.Above-mentioned gating circuit 50 is by closing to the disconnected of DC switch 51 the gating break-in facility controlling to realize infra-low frequency signal.
Above-mentioned coupling path 2 can combinationally use with any low pass filter and form has that direct current blocks, the low pass filter of infra-low frequency gating function, and this sentences Elliptic Function Type low pass filter is that example is described as embodiment.
Refer to Fig. 4 and Fig. 5, the Elliptic Function Type low pass filter that Fig. 4 connects for coupling path end of the present invention, Fig. 5 is the equivalent circuit diagram of low pass filtering access.
Coupling path 2 and low pass filtering access 1 are electrically connected at port one 7/18 place of metallic cavity 10, on the function basis of low pass filtering access 1, add the function that infra-low frequency break-make is selected.
After coupling path 2 is connected with low pass filtering access 1, the coupling bar that another free port of coupling path 2 is arranged in a connector and coupling path 2 is electrically connected, the stub that another free port of low pass filtering access 1 is also arranged in a connector and low pass filtering access 1 is electrically connected, and so forms one and has that direct current blocks, the Elliptic Function Type low pass filter of infra-low frequency gating function.
And described low pass filtering access 1 is the low pass filter of design forming in metallic cavity 10, includes metallic cavity 10 and fix the cover plate 20 of installation with metallic cavity 10.Multiple sub-chamber is formed in metallic cavity 10, and be connection window 16 between 11-15 between adjacent two sub-chambeies, thus each sub-chamber 11-15 of UNICOM successively, the each sub-chamber 11-15 that the interior stub of metallic cavity 10 30 (in figure no mark) traverses metallic cavity 10 longitudinally be connected window 16, and to be fixedly connected with the port one 7,18 that metallic cavity 10 two ends are arranged.Connect at each and corresponding stub 3 of window 16 to be provided with through stub 3 and towards the resonant rod 31-34 of cover plate 20.Cover plate 20 is provided with the screwed hole corresponding to above-mentioned resonant rod 31-34 present position and gos deep into metallic cavity 10 and the capacitively coupled tuning screw 21 of corresponding resonant rod 31-34 through this screwed hole (not shown).
Described multiple sub-chamber 11-15 substantially in the same direction (straight line) arranges in turn, the spatial volume Size-dependent of sub-chamber 11-15 realizes in the design of electrical performance indexes, preferably, except the party upwards head and the tail two sub-chambeies 11 and 15 spatial volume relatively little except, substantially the same or the akin spatial volume of the sub-chamber 12-14 of all the other sections of mediating, to can be considered etc. large.
Described stub 3 two ends respectively with two port ones 7, the inner wire (not shown) of 18 is connected, two port ones 7 and 18 are fixed in metallic cavity 10, thus stub 3 is fixed on the longitudinal axis of metallic cavity 10, thus through the connection window 16 between each sub-chamber 11-15 and adjacent sub-chamber.The stub 3 of each connection window 16 correspondence has hole (not shown), make one end of resonant rod 33 stretch to cover plate 20 through hole, and the other end of resonant rod 33 is stayed in stub 3.The length that resonant rod 33 stretches out stub 3 differs, and different resonant rod 33 adapts to different frequency ranges and has different length.Form multiple resonant rod 31-34 arranged along same straight line thus, these resonant rods 31-34 be connected window 16 and together form equivalent inductance in aforementioned equivalent inductance capacitance series resonance.
The spatial arrangement of the screwed hole on cover plate 20 and tuning screw 21 is the position of adaptation stub 3 and resonant rod 31-34 and linearly arranges, the external screw thread of tuning screw 21 and the internal thread of screwed hole 2 supporting, thus adjustable tuning screw 21 gos deep into the degree of depth in metallic cavity 10.Because tuning screw 21 stretches into one end tool installing hole of cavity 10, and the through hole that this installing hole is inside aperture to be reduced gradually or blind hole, this installing hole inner sleeve has a medium sleeve 22 be made up of polytetrafluoroethylene or other insulating material.One end end face that tuning screw 21 is exposed on cover plate 20 has flat recess for ease of rotation tuning screw rod 21, and the shaft of this end of tuning screw 21 is hex bolts structure.
The installing hole of tuning screw 21 further, is shoulder hole.Described medium sleeve 22 has local boss, make and tuning screw 21 interference fit, after medium sleeve 22 loads tuning screw 21, on medium sleeve 22, local raised head face exceeds the end face of tuning screw 21, be conducive to assembling like this, and medium sleeve 22 difficult drop-off and effectively prevent tuning screw 21 and stub 3 short circuit.
When cover plate 20 is installed in metallic cavity 10, along with going deep into of tuning screw 21, medium sleeve 22 in tuning screw 21 can inner sleeve resonant rod 31-34, thus the capacitive coupling realized between resonance screw rod 21 and corresponding resonant rod 31-34, thus tuning screw 21, medium sleeve 22 are coordinated with the resonant rod 31-34 on stub 3 install, capacitive coupling and inductive effect can be produced, form a series resonant circuit, its equivalent capacity inductance is decided by the relative position of tuning screw 21, stub 3, resonant rod 31-34 and resonant rod 31-34 and tuning screw 21.
Compared with prior art, the Elliptic Function Type low pass filter with infra-low frequency gating function of the present invention, by adopting distributed capacitor and gating circuit to the input control of signal, thus reach that Elliptic Function Type low pass filter blocks direct current, the function of infra-low frequency gating.By the realization of above-mentioned functions, reach following advantage: first, realize that low pass filter blocks direct current, the gating function of infra-low frequency signal first; Secondly, the gating function of low pass filter is realized by modular coupling path, thus this coupling path can be generalized to other such as devices such as mixer or this duplexer.
Have that direct current blocks, the structure of the Elliptic Function Type low pass filter of infra-low frequency gating function is applied in mixer, duplexer by of the present invention, the performance of its high bandwidth degree of suppression can be played better and direct current is blocked, the gating function of infra-low frequency signal.
Above-described embodiment only in order to the present invention is described and and unrestricted technical scheme described in the invention; Therefore, although this specification with reference to each above-mentioned embodiment to the explanation that present invention has been detailed second, those of ordinary skill in the art should be appreciated that and still can modify to the present invention or equivalent to replace; And all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (8)
1. an Elliptic Function Type low pass filter, the coupling path including low pass filtering access and be connected with low pass filtering access input, this coupling path is arranged in a containing cavity, it is characterized in that: described coupling path includes:
Distributed capacitor, include the second coupling bar that above-mentioned hole can be inserted in the first coupling bar of one end band hole and one end, described second coupling bar and the first coupling bar plug together formation distributed capacitor at hole place;
Gating circuit, include single-pass switch and the first gating branch road of respectively drawing from single-pass switch ends and the second gating branch road, the free end of the first gating branch road is electrically connected the second coupling bar, and the free end of the second gating branch road is electrically connected the first coupling bar;
Gating circuit is by closing to the disconnected of single-pass switch the gating break-in facility controlling to realize infra-low frequency signal.
2. Elliptic Function Type low pass filter according to claim 1, it is characterized in that: the first gating branch road of described gating circuit and the second gating branch road be all by an electric capacity and an inductance in series, the capacitor and inductor of wherein connecting, connect single-pass switch one end at electric capacity free end, connect corresponding coupling bar at inductance free end.
3. Elliptic Function Type low pass filter according to claim 1, it is characterized in that: described coupling path also comprises isolated medium, first coupling bar is one end band hole stub, the other end of the first coupling bar is electrically connected as the input of free end and low pass filtering access, second coupling bar is the stub that one end can penetrate the first coupling bar hole, the other end of the second coupling bar is as free end, and the second coupling bar is inserted in the first coupling bar hole, and the first coupling bar and the second coupling bar leave space in hole, penetrate hole part at the second coupling bar and be also arranged with isolated medium, second coupling bar and the first coupling bar are isolated.
4. Elliptic Function Type low pass filter according to claim 3, is characterized in that: described isolated medium is thin film dielectrics.
5. Elliptic Function Type low pass filter according to claim 3, is characterized in that: the first coupling bar of described coupling path and the cross section of the second coupling bar are all triangle or circular or other polygons.
6. Elliptic Function Type low pass filter according to claim 1, it is characterized in that: the both sides of first coupling bar one end of described coupling path are taked to extend two and paralleled or uneven conductor piece, second coupling bar one end is inserted between two conductor pieces, and inserts part cover and have medium.
7. a mixer, is characterized in that, comprises the overall structure as the Elliptic Function Type low pass filter in claim 1 to 6 as described in any one.
8. a duplexer, is characterized in that, comprises the overall structure as the Elliptic Function Type low pass filter in claim 1 to 6 as described in any one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310373690.0A CN103474726B (en) | 2013-08-23 | 2013-08-23 | Elliptic Function Type low pass filter |
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| CN201310373690.0A CN103474726B (en) | 2013-08-23 | 2013-08-23 | Elliptic Function Type low pass filter |
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| CN103474726A CN103474726A (en) | 2013-12-25 |
| CN103474726B true CN103474726B (en) | 2016-04-06 |
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| CN107112614A (en) * | 2014-12-31 | 2017-08-29 | 深圳市大富科技股份有限公司 | Tuning screw and its manufacture method, cavity body filter, communication equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5214395A (en) * | 1991-06-29 | 1993-05-25 | Samsung Electronics Co., Ltd. | Parasitic signal suppression circuit for an extremely high frequency oscillator |
| CN1601893A (en) * | 2003-09-24 | 2005-03-30 | 精工爱普生株式会社 | Impedance circuit, and filter circuit, amplifier circuit, semiconductor integrated circuit using the same |
| CN201042010Y (en) * | 2007-06-19 | 2008-03-26 | 京信通信系统（中国）有限公司 | Broad frequency band feeder |
| CN203503761U (en) * | 2013-08-23 | 2014-03-26 | 京信通信系统（中国）有限公司 | Elliptic function type low pass filter |
-
2013
- 2013-08-23 CN CN201310373690.0A patent/CN103474726B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5214395A (en) * | 1991-06-29 | 1993-05-25 | Samsung Electronics Co., Ltd. | Parasitic signal suppression circuit for an extremely high frequency oscillator |
| CN1601893A (en) * | 2003-09-24 | 2005-03-30 | 精工爱普生株式会社 | Impedance circuit, and filter circuit, amplifier circuit, semiconductor integrated circuit using the same |
| CN201042010Y (en) * | 2007-06-19 | 2008-03-26 | 京信通信系统（中国）有限公司 | Broad frequency band feeder |
| CN203503761U (en) * | 2013-08-23 | 2014-03-26 | 京信通信系统（中国）有限公司 | Elliptic function type low pass filter |
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Effective date of registration: 20230804 Address after: 510730, No. 6, Jin Lu, Guangzhou economic and Technological Development Zone, Guangdong, Guangzhou Patentee after: COMBA TELECOM TECHNOLOGY (GUANGZHOU) Ltd. Patentee after: COMBA TELECOM SYSTEMS (GUANGZHOU) Ltd. Address before: 510730 No. 6, layered Road, Guangzhou economic and Technological Development Zone, Guangdong Patentee before: COMBA TELECOM TECHNOLOGY (GUANGZHOU) Ltd. |